Crushable multiaxial behavior of sandwich foam cores: Pressure vessel experiments

Fatt, Michelle S. Hoo; Zhong, Chong; Gadepalli, Prasanna C; Tong, Xiaolong

doi:10.1177/1099636220909797

Cited by 6 publications

(6 citation statements)

References 30 publications

(36 reference statements)

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“…Detailed dimensions of these specimens can be found in References. 8,11 The average cell size of Divinycell H100 foam is 0.4 mm and there are on average 64 cells through the thickness of the 25.4 mm-thick panel. Although the specimens are small, homogenized properties of the foam can be obtained from them.…”

Section: Materials and Specimen Preparationmentioning

confidence: 99%

“…An elastic-plastic viscoelastic damage model was developed to describe the room-temperature response in Reference, 8 and it will be extended to cold temperatures. Before yielding, the foam experiences linear elastic behavior, as described by the mechanical analog in Figure 5(a), where boldC0 is the elastic stiffness matrix and ε represents strain.…”

Section: Elastic-plastic Viscoelastic Damage Modelmentioning

confidence: 99%

“…Polymer foams undergo damage and viscoelastic hysteresis in addition to plasticity when it is being crushed. 8 Crushable foam models that are based on metal plasticity do not address viscoelasticity and damage and are inadequate in predicting polymer foam crushing. Tong et al 9 used experimental results from Reference 8 to develop an anisotropic elastic-plastic viscoelastic damage model to predict the crushing and energy dissipation of Divinycell H100 foam under multiaxial loading.…”

Section: Introductionmentioning

confidence: 99%

“…8 Crushable foam models that are based on metal plasticity do not address viscoelasticity and damage and are inadequate in predicting polymer foam crushing. Tong et al 9 used experimental results from Reference 8 to develop an anisotropic elastic-plastic viscoelastic damage model to predict the crushing and energy dissipation of Divinycell H100 foam under multiaxial loading. This model was incorporated into ABAQUS Explicit and good agreement was found between ABAQUS predictions and experimental results with the Divinycell H100 foams under triaxial compression, triaxial compression-tension and triaxial compression-shear.…”

Section: Introductionmentioning

confidence: 99%

“…Temperature-dependent elastic and post-yield properties, including viscoelastic and damage quantities are extracted and used to predict multiaxial crushing response of Divinycell H100 foams at cold temperatures. Finally, the elastic-plastic viscoelastic damage model in Reference 8 is extended to describe the post yield, crushing behavior of Divinycell H100 foam at cold temperatures.…”

Section: Introductionmentioning

confidence: 99%

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Crushable polymer foam behavior at cold temperatures

Fatt

Vedire

Pakala

2023

Jnl of Sandwich Structures & Materials

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Experiments were conducted to characterize and develop predictive constitutive equations for the elastic-plastic, post-yield hysteresis behavior of Divinycell H100 foam at temperatures as low as −40°C. The initial elastic modulus and yield strength of the foam increased almost linearly by about 50% as temperatures decreased from 23 to−40°C. Post-yield hysteresis, which was described by strain hardening, viscoelasticity and damage also increased as the temperature fell to −40°C, but this behavior was curtailed by a sharp reduction in tensile and shear ductility as the foam approached its ductile-to-brittle transition temperature near −50°C. An anisotropic elastic-plastic, viscoelastic damage constitutive model was extended to predict cold temperature behavior. Good agreement was found between analytical predictions and the experimental results. The temperature-dependent constitutive equation can be used in conjunction with appropriate failure criteria to predict foam-core sandwich panel behavior in cold regions.

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Section: Materials and Specimen Preparationmentioning

confidence: 99%

Section: Elastic-plastic Viscoelastic Damage Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Crushable polymer foam behavior at cold temperatures

Fatt

Vedire

Pakala

2023

Jnl of Sandwich Structures & Materials

Self Cite

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Research on the Dynamic Compressibility of Polyurethane Microcellular Elastomer and its Application for Impact Resistance

Zhao,

Jiang,

et al. 2024

Chin J Polym Sci

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Effect of temperature on post-yield behavior of PVC foams

Vedire,

Hoo Fatt,

Pakala

2024

Multiscale and Multidiscip. Model. Exp. and Des.

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Experiments were conducted on Divinycell HCP30 foam to develop equations predicting its elastic and post-yield behavior from − 40 to + 60 °C. In these experiments, the foam was subjected to post-yield cyclic tension, compression and shear and monotonic biaxial tension and compression loading in the environmental chamber of an MTS servo-hydraulic machine. Elastic modulus and yield strength of the foam were found to decrease linearly with increasing temperature and could be expressed by a single equation in terms of room temperature properties. Post-yield behavior involved plasticity, viscoelasticity, and damage. An elastic–plastic viscoelastic damage model was used to predict post-yield behavior of the foam at different temperatures. Temperature dependent plastic hardening and viscoelastic damage functions were extracted from the experimental results and used to simulate elastic and post-yield stress–strain behavior in ABAQUS Explicit using a user-defined material subroutine. The ABAQUS user-defined material was validated with experiments on Divinycell HCP30 foam sheets at various temperatures. Good comparisons were found between ABAQUS and experimental results.

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Crushable multiaxial behavior of sandwich foam cores: Pressure vessel experiments

Cited by 6 publications

References 30 publications

Crushable polymer foam behavior at cold temperatures

Crushable polymer foam behavior at cold temperatures

Research on the Dynamic Compressibility of Polyurethane Microcellular Elastomer and its Application for Impact Resistance

Effect of temperature on post-yield behavior of PVC foams

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